Primary school students fun C ++ programming lesson 30 on the chessboard

Primary school students c ++ programming information

Link: https://pan.baidu.com/s/1XlA5AcjDXz5YWOFT32gSmw 
extraction code: 9iz9 

#include<iostream>
using namespace std;
int main()
{
  long long sum,n;   // long long为长整型
  int i;
  sum=0;
  n=1;
  for(i=1;i<=64;i++)
  {
     n*=2;
  	 sum+=n;
     cout<<i<<"   "<<n<<endl;
  }
  cout<<"总数："<<sum<<endl;
  return 0;
}